When Meredith asks Nathan to give her a reason to go out with him, he realizes he doesn't have a good reason. But, he tells her he thinks about her all the time, explains why he's always making a joke of everything, and gives her a reason to say yes to his dinner invitation. Watch this scene from Season 13, Episode 17, 'Till I Hear It From You' and don't miss Grey's Anatomy THURSDAYS 8|7c on ABC.